Muscles
Your muscles need to be stretched and exercised. Your muscles grow as you grow and can be worked out with weights and aerobics. The muscular systems works when one contracts the other returns to its original length, When you swim your muscles relax that is why coaches and people say you should not swim before a game.
People work out there muscle everyday from going to the gym to jogging in your neighborhood. When you pull a muscle you stretch it to far, when you tear a muscle you have pulled it way to far and it would need help from a doctor for surgery. Some people use steroids to rapidly increase there muscles but they can have horrible side affects,many body builders use steroids and they may look good at the time but after a while they start to decrease and eventually all the drugs can kill you!!!
Jackson Gorman
http://www.teachertube.com/viewVideo.php?video_id=41621
The Marvelous Muscular System
Poke a Muscle
http://www.anatomyarcade.com/games/PAM/PAM.html
Poke a Muscle is a fun game of memory and speed. Try to beat your score and see how many you can find.
Muscular Video
http://kidshealth.org/kid/htbw/_bfs_MSmoviesource.html
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Muscles
Your muscles need to be stretched and exercised. Your muscles grow as you grow and can be worked out with weights and aerobics. The muscular systems works when one contracts the other returns to its original length, When you swim your muscles relax that is why coaches and people say you should not swim before a game.
People work out there muscle everyday from going to the gym to jogging in your neighborhood. When you pull a muscle you stretch it to far, when you tear a muscle you have pulled it way to far and it would need help from a doctor for surgery. Some people use steroids to rapidly increase there muscles but they can have horrible side affects,many body builders use steroids and they may look good at the time but after a while they start to decrease and eventually all the drugs can kill you!!!
Jackson Gorman
http://www.teachertube.com/viewVideo.php?video_id=41621